Alfa AS Series CEM Replacement IC's

Replacement IC's for long out of production CEM IC's (CEM3340, etc) are back and with improved performance! Alfa AS series IC's are great for drop in replacement/substitution parts or for new designing!

  • AS3310 - Voltage Controlled Envelope Generator. CEM3310  pin-to-pin compatible

  • AS3320 - Voltage controlled filter. Improved CEM3320 pin-to-pin compatible

  • AS3330 - Dual Voltage Controled Amplifier (VCA). Improved CEM3330 replacement.

  • AS3340 - Voltage Controlled Oscillator (VCO). CEM3340, CEM3345  pin-to-pin compatible

  • AS3360 - Dual Voltage Controled Amplifier (VCA). CEM3360  pin-to-pin compatible

Availability: In stock

Product Name Price Qty
Alfa AS3310 VC-ADSR (PDIP-16)
Alfa AS3310 D VC-ADSR (SOIC-16)
Alfa AS3320 VCF (PDIP-18)
Alfa AS3320 F VCF (QFN-24)
Alfa AS3330 VCA (PDIP-18)
Alfa AS3340 VCO (PDIP-16)
Alfa AS3340 D VCO (SOIC-16)
Alfa AS3345 VCO (PDIP-18)
Alfa AS3360 Dual VCA (PDIP-14)
Alfa AS3360 Dual VCA (SOIC-14)



CEM Chips are back and with improved performance! Alfa AS series IC's are great for drop in replacement/substitution parts or for new designing! 

AS3310/AS3310D - Voltage Controlled Envelope Generator (ADSR)

The AS3310 is a self-contained, precision ADSR type of envelope generator intended for electronic music and other sound generation applications. Attack, decay and release times are exponentially voltage controllable over a wide range, and the sustain level is linearly voltage controllable from 0 to 100% of the peak voltage Vp. All four control Inputs are Isolated from the rest of the circuitry so that the control pins of tracking units may be simply tied together. 

- CEM3310 pin-to-pin compatible
- Large Time Control Range: 50,000:1 min
- Full ADSR Response
- True RC Envelope Shape
- Exceptionally Low Control Voltage Feedthrough: 90µVmax
- Accurate Exponential Time Control Scales
- Isolated Control Inputs
- Good Repeatability and Tracking Between Units Without External Trim
- Independent Gate and Trigger
- Wide power supply range:
   negative rail: -15V ÷ -9V (via external resistor)
   positive rail: +11,5V ÷ +15V



AS3320/AS3320F - Voltage controlled filter (VCF) 

The AS3320 is a high performance voltage controlled four-pole filter with on-chip voltage controllable resonance IC. The four independent sections may be interconnected to provide a wide variety of filter responses, such as low pass, high pass, band pass and all pass. A single input exponentially controls the frequency over greater than a ten octave range with little control voltage feedthrough. Another input controls the resonance in a modified linear manner from zero to low distortion oscillation. For those demanding applications, provision has been made to allow trimming for improved control voltage rejection. Each filter section features a variable gain cell which is fully temperature compensated, exhibits a better signal -to-noise ratio and generates its low distortion predominantly in the second harmonic. The device includes a minus two volt regulator to ensure low power dissipation and consequent low warm-up drift. 
- improved CEM3320 pin-to-pin compatible – bandwidth till 800 kHz
- voltage controllable frequency - 12 octave range 
- voltage controllable resonance - from zero to oscillation
- accurate exponential frequency scale
- accurate linear resonance scale
- low control voltage feed-through -45dB typical
- filter configurable into LPF, HPF, all pass, etc.
- low noise: -86dB typical
- low distortion in passband - 0.1% typical
- low warm up drift

AS3330 - Dual Voltage Controlled Amplifier (VCA) 

The AS 3330 is a dual, high performance, voltage controlled amplifier intended for electronic musical instrument and professional audio applications. Each amplifier includes complete circuitry for simultaneous linear and exponential control of gain. In addition, the operating point of the amplifiers may be set anywhere from Class В to Class A, allowing the user to optimize those parameters critical to the particular appli¬cation. Also featured are virtual ground summing nodes for both the signal and linear control inputs, so that signal and control mixing may be accomplished within the device itself. Finally, the VCA outputs are signal currents, allowing the device to be conveniently used in two-pole voltage controlled filters, as well as dual voltage controlled amplifiers.

- Two Independent Voltage Controlled Amplifiers in a Single Package
- Simultaneous Linear and Exponential Control Inputs
- Wide Control Range: 120dB min.
- Very Accurate Control Scales for Excellent Gain Tracking
- Exceptionally Low Control Voltage Feedthrough: better than -80dB
- Low Distortion: Less than 0.1%
- Exceptionally Low Noise: Better than -100dB
- Class B to Class A Operation
- Summing Signal and Linear Control Inputs
- Current Outputs for Ease of Use in Voltage Controlled 2-Pole Filters
- Can Be Used in VCO and VCF Control Paths Without Causing Shift
- ±15 Volt Supplies
- Improved CEM 3330 replacement.

AS3340/AS3340D/AS3345 - Voltage Controlled Oscillators ( VCO ) 

TThe AS 3340 and AS 3345 are completely self contained, precision voltage controlled oscillators, featuring both exponential and linear control scales and up to four buffered output waveforms: triangle, sawtooth, square, and pulse with voltage controllable pulse width. Full temperature compensation makes these VCOs extremely stable, and eliminates the need for a temperature compensation resistor. The highly accurate exponential and linear control inputs are virtual ground summing nodes, allowing mul¬tiple control voltages to be mixed within the device itself.


- CEM 3340 / CEM3345 replacement
- Large Sweep Range: 50,000:1 min
- Fully Temperature Compensated
- Four Output Waveforms Available; No waveform trimming required
- Summing Node Inputs for Frequency Control
- High Exponential Scale Accuracy
- Low Temperature Drift
- Voltage Controlled Pulse Width
- Hard and Soft Sync Inputs
- Linear FM
- Buffered, Short Circuit Protected Outputs
- ±15 Volt Supplies


AS3360/AS3360D - Dual Voltage Controled Amplifier ( VCA )

The AS3360 is a dual general purpose voltage controlled transconductor intended for such applications as voltage controlled amplifiers, filters, and waveform generators. Each transconductor independently provides both linear and exponential control scaling over greater than a 100 dB range. Complete with virtual ground summing inputs, wide voltage compliance current outputs, and control inputs referenced to ground, the AS3360 requires exceptionally few external components and is extremely easy to use.


- Two Independent VCAs in a Single 14 Pin package 
- Simple to Use - Few External Components Required
- Exceptionally Low Control Feedthrough Without Trimming: 10mV Maximum Out of 10 V.P.P. Output
- Low Noise: -110 dB Typical
- No Trimming Required
- Summing Node Signal Inputs
- Current Outputs Capable of Swinging to Within 1.5V of Each Supply
- Linear and Exponential Control
- Control Voltages Referenced to Ground
- Wide Supply Range: ±3 to ±12V or +15, -3 to -9V
- CEM3360 replacement

AS3310 Voltage Controlled Envelope Generator. CEM3310  pin-to-pin compatible
AS3320 Voltage controlled filter. Improved CEM3320 pin-to-pin compatible
AS3330 Dual Voltage Controled Amplifier (VCA). Improved CEM3330 replacement.
AS3340, AS3345 Voltage Controlled Oscillator (VCO). CEM3340, CEM3345  pin-to-pin compatible
AS3360 Dual Voltage Controled Amplifier (VCA). CEM3360  pin-to-pin compatible

Specs & Downloads

Specs & Downloads

100 No
Depth No
+12V No
-12V No
+5V No
Additional Resources AS3310 Datasheet
AS3320 Datasheet
AS3330 Datasheet
AS3340/45 Datasheet
AS3340 Application Notes
AS3360 Datasheet


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